Pneumatic tool



1,493,550 W. H. KELLER PNEUMATIC TOOL Filed July 17, 1918 2 Sheets-Sheet1 FIG; l1

lwowm William/1i zigzag my 13 1924;. v 1,493,550 w. H. KELLER PNEUMATICTOOL Filed July 17, 1918 2 Sheets-Sheet 2 Iwuomor williamjiifeilel;

Patented May 13, I924.

WILLIAM H. KELLER, OF GRAND HAVEN, MICHIG-AN.

PNEUMATIC TOOL.

Application filed July 17, 1918.

T 0 all whom it may concern:

Be it known that I, IVILLIAM I-I. KELLER, a citizen of the UnitedStates, and a resident of Grand Haven, in the county of Ottawa and Stateof Michigan, have invented certain new and useful Improvements in Pneumatic Tools, whereof the following is a specification, reference beinghad to the accompanying drawings.

My invention relates to that class of pneumatic tools which comprise asubstantially cylindrical elongated casing (adapted to contain thepiston, valve-box and valve), and a handle having a socket within whichthe casing is secured by means of screw threaded portions on theextremity of the casing and interior of the socket.

Ordinarily in these devices the compressed air, or other actuatingmedium, is introduced into the valve system through ducts formed withinthe body of the handle, but, as these inlet devices form no part of myinvention, they are not shown in the accompanying drawings.

In the drawings, Fig. I, represents, partly in side elevation and partlyin fragmentary section, a typical embodiment of my invention inconnection with a riveter.

Figs. II, and III, are respectively transverse sections on the lines II,II, and, III, III, of Fig. I.

Fig. IV, is a view, partly in side elevation and partly in fragmentarysection of a modified form of the device.

Fig. V, being a transverse section on the .line V, V, of Fig. IV.

Referring to the embodiment shown in Figs. I, II, and III, the handle 1,only a portion of which is indicated, is provided with a projectingsocket 2, of hollow cylindrical form, the interior surface thereof beingthreaded as shown at 3. The rear extremity of the casing 4, iscorrespondingly threaded, as indicated at 5. Within this rear portion ofthe casing the valve-box 6, and valve 7, are contained. The generalconstruction of these elements may be of any desired character, and theymay be employed in connection with the usual passages, such as 10, inthe wall of the casing. The exhaust from the valve-box 6, is distributedthrough a plurality of radial ports 11, which lead through the wall ofthe casing and communicate with an annular channel 12, formed in thewall of the socket adjacent to the front end thereof. Said chan- SerialNo. 245,293.

nel is provided with an elongated outlet for ultimate discharge, twosuch outlets 13, and 14, being employed in this instance.

The discharge thus occurs on the lower side of the implement, in thenormal position of use, and is directed forwardly, or away from theoperator.

The rear extremity of the casing 1, is provided beyond the threadedportion 5, with an extension 18, preferably somewhat reduced in externaldiameter, which fits within the bottom of the socket 2. This extensionis provided with ratchet teeth 20, the abrupt surfaces of the teethfacing in the direction of the rotative movement which corresponds withthe unscrewing of the casing from the socket.

The ratchet teeth are symmetrical and ar ranged at similar intervals. Ata plurality of points (preferably three, as shown), I form radial holes21., through the wall of the socket, at the region which surrounds theratchet teeth, these holes being located at angular distances apart,which do not correspond with the distance between two ratchet teeth, orwith a multiple thereof. Hence the holes may be characterized asirregularly disposed, with relation to the teeth. A cylindrical stud 23,provided with a tooth 24-, adapted to fit snugly within any one of theratchet teeth, is removably inserted in any one of the holes 21, andwhen the abrupt face of the tooth 24. is in position to engage with oneof the ratchet teeth, rot-ative movement of the casing in the directionfor uuscrewing will be absolutely prevented. The outer end of the studis provided with a projecting flat finger-piece 25, on each side ofwhich is a flat shoulder 26. A spring clip 27, of a length suflicient toembrace substantially more than a semi-circle of the outer periphery ofthe socket, and adapted to clamp closely the surface thereof, isemployed to hold the stud in position, the clip being provided with ashort slot to permit the passage of the finger-piece 25, and the tensionof the spring being exerted upon the shoulder 26, of the stud. Thespring clip is provided at one edge with an inwardly projectingperipheral-flange 28, which engages in a shallow cavity 29, formed inthe outer surface of the .faceof the socket, in order to preventdisplacement of the clip in the direction of the axis of the socket. Itwill thus be seen that by reason of the irg ar p ti n of the holes 21,with re lation to the ratchet teeth 20, the casing may be securedagainst rotation relatively to the socket when it has been inserted tothe desired depth therein, since registration of thalocking face of thestud-tooth With some one of the ratchet teeth, can readily be found.

Referring now to the type of device shown in Figs. IV, and V, the handleis indicated at 30, the internally threaded socket at 3i, the casing at32, and the valve box at 38. Here it will be noted that the threadedpoition 3d, of the socket only extends throughout a comparatively shertregion, the threaded end 35, of the casing being of similar axialextent.

Instead of being contained within the rear portion of the casing 32, asin Figs. I, II, and III, the valve-box 33 here forms, in effect, acoaxial extension, continuation. or prolongation of the rear extremityof the casing beyond its threaded portion 31. -being, however, made as aseparate piecefor convenience in manufacture andsecured against rotationrelatively to the rest of the casing 82, by means of dowel pins such as36, and 37. At its rear extremity, the valve-box portion 33 ot thecasing 32 is provided (like the corresponding reduced unthreadedextension 18 of the casing 4- in Figs. I, II, and III) with peripheralratchet teeth, 38, which fit within the socket at the region adjacenttothe inner end thereof. The discharge ports 39, of the valve box,indicated in dotted lines in Fig. IV, thus lead into the annular space40, between the exterior surface of the valvebox, and the proximate faceof thesocket, which thus constitutes an annular channel, from which theultimate discharge may be led out at any desired point. A plurality ofradial holes 1&0, are formed through the wall of the casing. and a stud41., which is adapted to engage witn one of the ratchet teeth. fitsremovably in one of" said holes. said stud being secured in position bymeans of a spring clip 42, as above described.

'l'laving thus described my invention, I claim.

'1. In a pneumatic tool comprising a handle having an internallythreaded cylindrical socket and a casing having an externally threadedportion embraced by said socket when the casing is in operative positiontherein. the combination of a series of peripheral ratchet teetharranged a portion of the casing embraced by the sock ct. when thecasing is in operative position therein. the abrupt surfaces of saidratchet teeth facing in a direction which corresponds with the directionof rotation for unscrewing said casing; said socket being provided witha plurality of radial holes arranged at the region embracing theratchetteeth, but irregularly disposed with relation to the ratchetteeth; a stud adapted to fit in any one of said holes, and to engage oneof said ratchet teeth; and means embracing said socket for retainingsaid stud in position against endwise displace ment when in any one ofsaid holes.

2. In a pneumatic tool comprising a handle having an internally threadedcylindrical socket and a casing having an externally threaded portionembraced by said socket when the casing is in operative positiontherein, a series of periphal ratchet teeth arranged at the portion ofthe (as ing embraced by the socket when the casing is in operativeposition, the abrupt surfaces of said ratchet teeth facing in adirection which corresponds with the direction of rotation forunscrewing said casing; said socket being provided with a plurality ofholes arranged. at the region embracing the atchet teeth, butirregularly disposed with relation to said ratchet teeth: a stud adaptedto fit in any one of said holes and to engage one of said ratchet teeth;a finger-piece mounted upon the outer end of said stud; and a springclip adapted to embrace and clamp the external surface of the socket andto engage the external end of the stud and retain it against endwisedisplacement when in any one of said holes, said clip being providedwith an aperture to receive thefinger-piece of the stud.

3. In a pneumatic tool, the combination of a casing, having anexternally threaded rear portion; a handle provided with an internallythreaded cylindrical socket, said threaded portion of the socketterminating at a substantial distance from the bottom thereof; avalvebox projecting beyond the threaded rear portion of the casing. saidvalve-box being provided with a series of peripheral ratchet teeth whoseabrupt surfaces face in a direction which corresponds with the directionof rotation for unscrewing said casing, and said socketbeing providedwith a plurality of holes, arranged at the region embracing the ratchetteeth, but irregularly disposed with relation to said ratchet teeth; astud adapted to fit in any one of said holes and to engage with one ofsaid ratchet teeth: and means embracing said socket for retaining saidstud in position against endwise displacement when in anyone of saidholes.

In testimony whereof, I have hereunto signed my name at Grand Haven.Mich, this 11th day of July, 1918.

WILLIAM H. KELLER.

Witnesses:

ALBERT SHINKEZ, M. MAXIMILIAN.

